Ruby Interview Questions and Answers
Question - 31 : - Explain About Interpolation?
Answer - 31 : -
Interpolation is a very important process in Ruby. Interpolation is the process of inserting a string into a literal. There is only one way in which you can interpolate a string into a literal by placing a Hash (#) within {} open and close brackets. This refers to a new name to by referring to the copy of the original method.
Question - 32 : - What Is Rails?
Answer - 32 : -
Ruby on Rails is a web application framework. It is written in Ruby. Compare to other frameworks for web application, the big deal is the way Ruby on Rails does. A web application finished in days instead of weeks, it is noticed by the community. Maintenance and/or extension of messy and hard web applications is flexible with ruby rails.
Question - 33 : - Explain About Ruby Code Blocks?
Answer - 33 : -
Ruby code blocks form an important part of ruby and are very fun to use. With the help of this feature you can place your code between do-end and you can associate them with method invocations and you can get an impression that they are like parameters. They may appear near to a source of the code and adjacent to a method call. The code is not executed during the program execution but it is executed when the context of its appearance is met or when it enters a method.
Question - 34 : - Overview Of Ruby Programming Language?
Answer - 34 : -
Ruby is a dynamic, open source programming language. It focuses on productivity and simplicity. The syntax is elegant which is natural to read and easy to write and use. The language is flexible, since it allows the developers alter freely all its parts. At will, one can remove essential parts and redefined. For instance , the symbol + can be redefined by the word ‘plus’ to one of the its classes – Numeric.
Ruby supports multiple programming paradigms, such as, functional, imperative, object oriented, relative. Dynamic memory management and dynamic type systems are additional features of Ruby.
Question - 35 : - Explain next statement in Ruby.
Answer - 35 : -
Ruby next statement is used to skip loop's next iteration. Once the next statement is executed, no further iteration will be performed.
Question - 36 : - Explain redo statement in Ruby.
Answer - 36 : -
Ruby redo statement is used to repeat the current iteration of the loop. The redo statement is executed without evaluating loop's condition.
Question - 37 : - Explain retry statement in Ruby.
Answer - 37 : -
Ruby retry statement is used to repeat the whole loop iteration from the start.
Question - 38 : - How will you comment in Ruby.
Answer - 38 : -
Ruby comments are non-executable lines in a program. They do not take part in the execution of a program.
Single line comment syntax:
#This is single line comment.
Multi line comment syntax:
=begin
This
is
multi line
comment
=end
Question - 39 : - Explain Ruby object.
Answer - 39 : -
Object is the default root of all Ruby objects. Ruby objects inherit from BasicObject which allows creating alternate object hierarchies.
Question - 40 : - How to create Ruby object?
Answer - 40 : -
Objects in Ruby are created by calling new method of the class. It is a unique type of method and predefined in Ruby library.
Syntax:
objectName=className.new